EP3512151A1 - Verwaltung von bandteilen in sekundärzellen - Google Patents

Verwaltung von bandteilen in sekundärzellen Download PDF

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Publication number
EP3512151A1
EP3512151A1 EP19151196.3A EP19151196A EP3512151A1 EP 3512151 A1 EP3512151 A1 EP 3512151A1 EP 19151196 A EP19151196 A EP 19151196A EP 3512151 A1 EP3512151 A1 EP 3512151A1
Authority
EP
European Patent Office
Prior art keywords
scell
bwp
activating
deactivating
inactivitytimer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19151196.3A
Other languages
English (en)
French (fr)
Inventor
Shiang-Rung Ye
Chih-Hsiang Wu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HTC Corp
Original Assignee
HTC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HTC Corp filed Critical HTC Corp
Publication of EP3512151A1 publication Critical patent/EP3512151A1/de
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0896—Bandwidth or capacity management, i.e. automatically increasing or decreasing capacities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0096—Indication of changes in allocation
    • H04L5/0098—Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H04W28/20—Negotiating bandwidth
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2101/00—Indexing scheme associated with group H04L61/00
    • H04L2101/60—Types of network addresses
    • H04L2101/618—Details of network addresses
    • H04L2101/622—Layer-2 addresses, e.g. medium access control [MAC] addresses

Definitions

  • the present invention relates to a device and a method used in a wireless communication system, and more particularly, to a device and a method of handling bandwidth parts (BWPs) in a wireless communication system.
  • BWPs bandwidth parts
  • NR new radio
  • SCell secondary cell
  • BWP-InactivityTimer is not stopped, which results a bandwidth part (BWP) switching when the SCell is deactivated.
  • BWP-InactivityTimer is not started and the medium access control (MAC) is not allowed to switch the BWP autonomously.
  • the present invention therefore provides a communication device for handling the BWPs to solve the abovementioned problem.
  • a communication device for handling BWPs comprises at least one storage device for storing instructions and at least one processing circuit coupled to the at least one storage device.
  • the at least one processing circuit is configured to execute the instructions stored in the at least one storage device.
  • the instructions comprise receiving a first MAC control element (CE) (MAC CE) for activating at least one first SCell, from a network; activating the at least one first SCell; starting a sCellDeactivationTimer associated with the at least one first SCell, when activating the at least one first SCell; deactivating the at least one first SCell, if a second MAC CE for deactivating the at least one first SCell is received from the network, or if the sCellDeactivationTimer expires; stopping the sCellDeactivationTimer, when deactivating the at least one first SCell; and stopping a first BWP-InactivityTimer for the at least one first SCell, when deactivating the at least one first SCell.
  • CE MAC control element
  • a method for handling BWPs utilized in a communication device comprises receiving a first MAC CE for activating at least one first SCell, from a network; activating the at least one first SCell; starting a sCellDeactivationTimer associated with the at least one first SCell, when activating the at least one first SCell; deactivating the at least one first SCell, if a second MAC CE for deactivating the at least one first SCell is received from the network, or if the sCellDeactivationTimer expires; stopping the sCellDeactivationTimer, when deactivating the at least one first SCell; and stopping a first BWP-InactivityTimer for the at least one first SCell, when deactivating the at least one first SCell.
  • a network and communication devices are simply utilized for illustrating the structure of a wireless communication system 10.
  • the network includes at least one of a long-term evolution (LTE) network, an evolved LTE network, a new radio (NR) network and a sixth generation (6G) network.
  • the 6G radio communication technology may employ orthogonal frequency-division multiplexing (OFDM) or non-OFDM, a wider bandwidth (e.g., 1GHz, 2GHz or 5GHz) and a transmission time interval (TTI) shorter than 1 ms (e.g., 1, 2, 3 or 4 OFDM symbols, or 100 or 200 us) for communication between the communication devices and a 6G base station (BS).
  • OFDM orthogonal frequency-division multiplexing
  • non-OFDM a wider bandwidth
  • TTI transmission time interval
  • 1 ms e.g., 1, 2, 3 or 4 OFDM symbols, or 100 or 200 us
  • a communication device may be a user equipment (UE), a mobile phone, a laptop, a tablet computer, an electronic book, a portable computer system, a vehicle, or an aircraft.
  • the network and the communication device can be seen as a transmitter or a receiver according to direction of transmission (i.e., transmission direction), e.g., for an uplink (UL), the communication device is the transmitter and the network is the receiver, and for a downlink (DL), the network is the transmitter and the communication device is the receiver.
  • UL uplink
  • DL downlink
  • a communication device 20 may be a communication device or the network shown in Fig. 1 , but is not limited herein.
  • the communication device 20 may include at least one processing circuit 200 of which each may be a microprocessor or Application Specific Integrated Circuit (ASIC), at least one storage device 210 and at least one communication interfacing device 220.
  • the at least one storage device 210 may be any data storage device that may store program codes 214 accessed and executed by the at least one processing circuit 200.
  • the at least one storage device 210 examples include but are not limited to a subscriber identity module (SIM), read-only memory (ROM), flash memory, random-access memory (RAM), hard disk, optical data storage device, non-volatile storage device, non-transitory computer-readable medium (e.g., tangible media), etc.
  • SIM subscriber identity module
  • ROM read-only memory
  • RAM random-access memory
  • the at least one communication interfacing device 220 includes at least one transceiver used to transmit and receive signals (e.g., data, messages and/or packets) according to processing results of the at least one processing circuit 200.
  • a serving cell may be configured with at most four bandwidth parts (BWPs).
  • An active BWP is configured for an activated serving cell.
  • a BWP switching for a serving cell is used to activate an inactive BWP and to deactivate an active BWP at a time.
  • the BWP switching is controlled by a physical DL control channel (PDCCH) indicating a DL assignment or an UL grant.
  • PDCCH physical DL control channel
  • SCell secondary cell
  • one BWP is initially active without receiving the PDCCH indicating a DL assignment and an UL grant.
  • a DL BWP is paired with an UL BWP.
  • the BWP switching is available for both the UL and the DL.
  • the UE determines whether to perform the BWP switching or to ignore the PDCCH for the BWP switching. If the UE determines to perform the BWP switching, the UE stops the ongoing RA procedure and initiates another RA procedure on a new activated BWP. On the other hand, if the UE determines to ignore the PDCCH for the BWP switching, the MAC entity continues the ongoing RA procedure on the active BWP.
  • RA random access
  • MAC medium access control
  • a UE is used for representing a communication device in Fig. 1 , to simplify the illustration of the examples.
  • a process 30 in Fig. 3 is utilized in a UE to handle BWPs, and includes the following steps:
  • the UE receives a first MAC CE for activating at least one first SCell, from a network. Then, the UE activates the at least one first SCell and starts a sCellDeactivationTimer associated with the at least one first SCell, when activating the at least one first SCell. If a second MAC CE for deactivating the at least one first SCell is received from the network, or if the sCellDeactivationTimer expires, the UE deactivates the at least one first SCell. When deactivating the at least one first SCell, the UE stops the sCellDeactivationTimer and a first BWP-InactivityTimer for the at least one first SCell. That is, as long as the at least one first SCell is deactivated, the first BWP-InactivityTimer is stopped accordingly. Thus, a BWP switching is not performed since the first BWP-InactivityTimer is stopped.
  • Realization of the process 30 is not limited to the above description. The following examples may be applied to the process 30.
  • the first BWP-InactivityTimer indicates a duration after the UE switching back to the default BWP.
  • the UE stops the first BWP-InactivityTimer without switching to the default BWP.
  • the UE when the at least one first SCell is activated, the UE performs operation(s) on the at least one first SCell.
  • the operation(s) performed on the at least one first SCell include sounding reference signal (SRS) transmission(s), a channel quality indication (CQI) / a precoding matrix indicator (PMI) / a rank indicator (RI) / a channel-state-information (CSI) reference signal (CSI-RS) resource indicator (CRI) reporting for the at least one first SCell, a PDCCH monitoring and physical UL control channel (PUCCH) transmission(s) .
  • SRS sounding reference signal
  • CQI channel quality indication
  • PMI precoding matrix indicator
  • RI rank indicator
  • CSI-RS channel-state-information reference signal
  • CRI channel-state-information reference signal
  • the UE restarts the sCellDeactivationTimer, if a PDCCH on the at least one first SCell comprises an UL grant or a DL assignment.
  • the UE when the at least one first SCell is deactivated, the UE does not perform the operations on the at least one first SCell described above.
  • the UE if the active DL BWP is not the BWP indicated by a default-DL-BWP and a PDCCH indicating a DL assignment is received on the active BWP, the UE starts the BWP-InactivityTimer associated with the active DL BWP.
  • the UE activates the at least one second SCell. Then, the UE starts a second BWP-InactivityTimer for the at least one second SCell, when activating the at least one second SCell. That is, as long as the at least one second SCell is deactivated, the second BWP-InactivityTimer is started accordingly. Thus, the BWP switching is performed since the second BWP-InactivityTimer is started.
  • the UE stops the second BWP-InactivityTimer, if a RA procedure is initiated.
  • the UE performs a BWP switching for the at least one second SCell, if the second BWP-InactivityTimer expires.
  • the present invention provides a method and a communication device for handling BWPs.
  • the SCell is deactivated, the UE stops the BWP-InactivityTimer to prevent the BWP switching from being performed.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)
EP19151196.3A 2018-01-11 2019-01-10 Verwaltung von bandteilen in sekundärzellen Withdrawn EP3512151A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US201862615976P 2018-01-11 2018-01-11

Publications (1)

Publication Number Publication Date
EP3512151A1 true EP3512151A1 (de) 2019-07-17

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EP19151196.3A Withdrawn EP3512151A1 (de) 2018-01-11 2019-01-10 Verwaltung von bandteilen in sekundärzellen

Country Status (4)

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US (1) US11246122B2 (de)
EP (1) EP3512151A1 (de)
CN (1) CN110035458B (de)
TW (1) TWI688288B (de)

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US11456842B2 (en) * 2017-10-20 2022-09-27 Sharp Kabushiki Kaisha Terminal apparatus, base station apparatus, and communication method

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GB2594740B (en) * 2020-05-06 2022-11-23 Arm Cloud Tech Inc Connecting and resetting devices

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* Cited by examiner, † Cited by third party
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US11456842B2 (en) * 2017-10-20 2022-09-27 Sharp Kabushiki Kaisha Terminal apparatus, base station apparatus, and communication method
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CN111345068B (zh) * 2020-02-11 2021-12-28 北京小米移动软件有限公司 数据通信方法、装置、通信设备及存储介质

Also Published As

Publication number Publication date
TW201931894A (zh) 2019-08-01
CN110035458A (zh) 2019-07-19
US11246122B2 (en) 2022-02-08
TWI688288B (zh) 2020-03-11
US20190215808A1 (en) 2019-07-11
CN110035458B (zh) 2023-06-20

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